Phone numbers in Iowa City, Iowa
Iowa City has 50 phone prefixes in area code 319.
Biggest holders: CenturyLink / Lumen, T-Mobile (including Sprint), UScellular. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 34%
- Internet / business phone carrier 24%
- Phone company 4%
Every prefix in Iowa City
Search the first six digits of a number in this list. If it's here, the number started in Iowa City with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 319-248 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 319-259 | Telnyx | Internet / business phone carrier | 2017 |
| 319-319 | Onvoy | Internet / business phone carrier | 2022 |
| 319-321 | Verizon Wireless | Mobile carrier | – |
| 319-325 | UScellular | Mobile carrier | 2001 |
| 319-330 | UScellular | Mobile carrier | – |
| 319-331 | Verizon Wireless | Mobile carrier | – |
| 319-333 | Mcc Telephony | Internet / business phone carrier | 2010 |
| 319-335 | CenturyLink / Lumen | Local phone company | – |
| 319-337 | CenturyLink / Lumen | Local phone company | – |
| 319-338 | CenturyLink / Lumen | Local phone company | – |
| 319-339 | CenturyLink / Lumen | Local phone company | – |
| 319-341 | CenturyLink / Lumen | Local phone company | – |
| 319-351 | CenturyLink / Lumen | Local phone company | – |
| 319-353 | CenturyLink / Lumen | Local phone company | – |
| 319-354 | CenturyLink / Lumen | Local phone company | – |
| 319-356 | CenturyLink / Lumen | Local phone company | – |
| 319-358 | CenturyLink / Lumen | Local phone company | – |
| 319-359 | Mcc Telephony | Internet / business phone carrier | 2012 |
| 319-379 | Hd Carrier | Internet / business phone carrier | 2020 |
| 319-381 | Stratus Networks | Phone company | 2020 |
| 319-383 | AT&T Mobility | Mobile carrier | 2011 |
| 319-384 | CenturyLink / Lumen | Local phone company | – |
| 319-400 | AT&T Mobility | Mobile carrier | 2001 |
| 319-402 | Comcast | Internet / business phone carrier | 2023 |
| 319-430 | UScellular | Mobile carrier | – |
| 319-466 | CenturyLink / Lumen | Local phone company | – |
| 319-467 | CenturyLink / Lumen | Local phone company | – |
| 319-471 | T-Mobile (including Sprint) | Mobile carrier | – |
| 319-485 | Windstream (PAETEC) | Internet / business phone carrier | 2024 |
| 319-492 | Onvoy | Internet / business phone carrier | 2024 |
| 319-499 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 319-512 | AT&T Mobility | Mobile carrier | – |
| 319-519 | Airus | Phone company | 2014 |
| 319-530 | UScellular | Mobile carrier | – |
| 319-541 | Verizon Wireless | Mobile carrier | – |
| 319-569 | Mcc Telephony | Internet / business phone carrier | 2017 |
| 319-594 | T-Mobile (including Sprint) | Mobile carrier | – |
| 319-600 | Fractel | Internet / business phone carrier | 2019 |
| 319-621 | T-Mobile (including Sprint) | Mobile carrier | – |
| 319-631 | T-Mobile (including Sprint) | Mobile carrier | – |
| 319-678 | CenturyLink / Lumen | Local phone company | 2012 |
| 319-688 | CenturyLink / Lumen | Local phone company | – |
| 319-800 | Verizon Wireless | Mobile carrier | – |
| 319-834 | CenturyLink / Lumen | Local phone company | – |
| 319-855 | AT&T Mobility | Mobile carrier | 2008 |
| 319-867 | Commio | Internet / business phone carrier | 2019 |
| 319-887 | CenturyLink / Lumen | Local phone company | – |
| 319-930 | UScellular | Mobile carrier | – |
| 319-936 | T-Mobile (including Sprint) | Mobile carrier | – |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.